Calculation in new form field (Newbie question)

"Gert Blij" <[email protected]>
Newsgroups gmane.comp.openoffice.dba.user
Organization Gert Blij
Message-ID <[email protected]>
Ooo 122, WinXP

Assume I have two table fields Qty and CostPrice. How can I create a form
field that displays the result of Qty * CostPrice?

If there is any documentation on this, where would I find it?

TIA
Gert
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